Top 5 Copper Peptide Serums You Need to Try! Not all copper peptide serums are created equal here are my absolute favorites, each tailored to different skin needs. Save Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum GHK Cu Blue Copper Peptide Serum Cellular Glow Copper Peptide GHK Cu Serum for Face Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with